[ELF] elfiamcu triple should imply e_machine == EM_IAMCU

Differential Revision: http://reviews.llvm.org/D14109

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252043 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed